I've been asked to lead a workshop on headline writing for B2B publications. I have some resources, but I wonder if you have any to recommend?

These are pretty generic ideas, and maybe more aimed at newspaper people, but maybe you will find something.

http://edit.lee.net/heavenly_headlines/past_tips/

And one more.

http://www.copyblogger.com/magnetic-headlines/

Great! Thanks for the help. I had the copyblogger link, but not the other one. Copyblogger is too "ad agency" for us. I'll let you know how it turns out...